Fedekico giolitti



F. GIOLITTI.

CEMENTATDON PROCESS FOR ARMOR PLATES EMPLOYING MIXED CEMENTATION AGENTS.

APPLICATION FILED ocnm. 1914.

1,195,459. Patented Aug. 22, 1916.

"entrain snares PATENT carton.

FEDERICO GIOLITTI, OF TURIN, ITALY, ASSIGNOR TO SOCIETA ANONIIVIAITALIANA GIO ANSALDO & (3., OF GENOA, ITALY.

CEMENTATION PROCESS FOR ARIVIOR-PLATES EMPLOYING MIXED CEMENTATIONAGENTS.

earse.

Application filed October 14, 1914:.

.undesirable results arising from the exposure of the pipe conveying thegaseous cementation agent to the action of the heated furnace gases areavoided-and the gaseous reagent is more uniformly distributed over thesurface to be treated and thus the cem entation is effected with agreater degree of uniformity.

A further object of the invention is to facilitate the replacement ofthe solid cementation agent which is consumed in the process and thusfurther to assist in obtaining a more uniform cementation effect.

According to the invention the armor plates are vertically disposed uponthe hearth of the cementation furnace and coupled together by means ofmetallic prisms or sheets, in such a manner as to form with the faces tobe cemented the larger walls of a flat box supported by the hearth atone of its open sides. This lower open side serves for introducing thecementing gas, while the upper open side serves for introducing thesolid cementation agent consumed during the process.

The invention is illustrated by way of examples in the accompanyingdrawings wherein,

Figure 1 shows in a horizontal section two armor plates placed in anordinary gas fired furnace having a movable hearth. Fig. 2 is a verticalsection of the same. Fig. 3 shows in a vertical section the samearrangement applied in a double fired gas furnace having a movablehearth.

The same letters denote like parts in all the figures.

A, A. A and A represent armor plates set on edge, B represents a prismand B a plate employed for connecting the two plates Specification ofLetters Patent.

Patented Aug. 2.2, 1916.

Serial No. 866,701.

together thus forming with the armor plates a hollow prism on the upperend of which is mounted a refractory boX C, C, 'C. A gas conduit Dprovided with nozzles is arranged in the movable hearth E upon which thearmor plates are mounted. The box-like space formed by the plates A, A.or A. A, is filled with a solid cementation agent; for instance,carbonaceous material F. ii

G, G, are wheels on which the movable hearth runs.

H, H, are inner walls of the furnace, the outer walls of which areindicated by K. The fire gases pass into the furnace chamber by theopenings L and the waste gases pass out at M, while the gaseouscementation agent is introduced by way of the pipe D which traverses themovable hearth E.

The furnace illustrated in Fig. 3 is provided with two movable hearths,the furnace gases passing into the furnace at each side and out by wayof a central flue by which arrangement a better utilization of thefurnace and a more uniform heating of the plates is attained.

The purpose of the box C, C, C. is to provide a container for a reserveof the solid cementation agent to replace that introduced between theplates and which during the process becomes consumed.

Having now described my invention. what I claim as new and desire'tosecure by Letters Patent is 1. A process for cementing armor platescomprising arranging the plates vertically on the hearth of a furnace,filling the space intervening between the plates with a solidcementation agent and introducing a gaseous cementation agent throughthe hearth of the furnace into the space between the plates.

2. A process for cementing armor plates comprising arranging the platesvertically on the hearth of a furnace, connecting together the plates bymeans of metal plates or prisms, filling the box-like space thus formedwith a solid cementation agent and introducing a current of a gaseouscementation agent through the hearth of the furnace into the space thusformed.

3. A process for cementing armor plates comprising arranging the platesvertically on the hearth of a furnace, arranging a re fractory box onthe upper edges of the name to this specification in the presence ofplates, filling the box and the space between two subscribing witnesses.the plates with a solid cementation agent, 1) and introducing a gaseouscementation agent FLDERICO GIOLITTI' 5' through the hearth of thefurnace into space Witnesses:

between the plates. GIACOMO CARDARO,

In testimony whereof I have signed my A. BORNQUIS GAURA.

